I'm looking for 33in tires that work well on the highway as I drive my truck about 350 miles a week. I'm getting good MPGs as is and I'd like to keep it that way. I have a new rear end and front end with lower gears to offset the new bigger tires. The only 10.50 ones coming up are ones I don't want BFG AT's. I like what I see in the 12.50 ones though. More Highway friendly, but I'm wondering how much this hurt me going so much wider? I need new rims too so I can get whatever size I need.